Surely Aladdin’s magical lamp never lighted up such jewelled wonders as are to be beheld here! Here are halls and corridors, stairways and galleries, chasms and bridges, built or hollowed out with a weird architectural magnificence wonderful to behold. We stand in the spacious nave of the cathedral, and gaze at its groined and glittering roof, and Gothic columns of many-coloured stalactite. The utter silence (which never exists in the outer world, where there is always the whirr of invisible insects, the stir of leaves, the whispering of grasses, and a thousand other nameless sounds) here is supremely impressive; the air, laden with solemn stillness, lies heavy and close round us. We listen for the roll of some hidden organ to fill the darkening shadows with music, and tempt us to fall upon our knees in worship of the Great Unknown. We pass through a narrow jagged passage full of grotesque shapes and caricatures of things real and unreal, till we come to a damp, low-roofed opening called the bridal chamber, which is profusely ornamented with fantastic formations of crystalline rock. It is said, I don’t know how truthfully, that some benighted imbeciles have already been married on this spot. The roof is everywhere supported by hundreds of columns of various gradations of colour and size, from a thin walking cane to the grand pillar in the “giant’s hall,” which is nearly twenty feet in circumference, and is ribbed and rugged like the bark of a tree. A curious feature in this particular cave is the profusion of thin icicles--I do not know by what other name to call them; it seems as though threads of ice had been woven together in a veil of frost work unknown to decorative art. They hang from the edges, and drape the walls in falling folds like a tapestry curtain; they droop in graceful folds before Diana’s bath, and are drawn round the couch of the “sleeping beauty”--for a symmetrical form that is almost human lies shrouded in ice beneath it. Fancy has found some appropriate name for every nook and corner, form and figure, of this underground world. However fantastic these stalactite embellishments may be they are never inharmonious, one thing never seems out of keeping with another. Here we may gather to ourselves lessons of loveliness, and the mysterious mingling of the beautiful in form and colour that æstheticism tries in vain to teach.